package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {
    /**
     * 正常访问
     *
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "  paymentInfo_OK,id=：" + id + "\t" + "哈哈";
    }

    /**
     * 调用超时或者异常
     *
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
    })
    public String paymentInfo_TimeOut(Integer id) {
        // 异常测试
//        int a = 10/0;
        int timeNumber = 3;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" + Thread.currentThread().getName() + "  paymentInfo_TimeOut,id=：" + id + "\t" + "耗时（秒）:" + timeNumber;
    }

    /**
     * 降级回调函数
     *
     * @param id
     * @return
     */
    public String paymentInfo_TimeOutHandler(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "  paymentInfo_TimeOut,id=：" + id + "\t" + "繁忙中，，，，，";
    }

    //----------------------------服务熔断-------------------------
    @HystrixCommand(fallbackMethod = "paymentcircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),  // 是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),  // 请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), // 时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"),  // 失败率达到多少后跳闸
    })
    public String paymentcircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("****id不能为负数");
        }
        String serialNumber = IdUtil.simpleUUID();  // == UUID.randomUUID().toString();
        return Thread.currentThread().getName() + "\t" + "调用成功,流水号:" + serialNumber;
    }

    public String paymentcircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id不能负数，请稍后再试，id：" + id;
    }
}

